I got my belly button peirced like 4months ago and I changed the ring out but I think it was to heavy! Because I started to notice a lump/bump on the bottom but its soft. So I changed it back two the first ring. Any ideas of what it is? It is sore but I think its cause of the piercing change. HELP!?

I got my belly pierced about a year ago and the same thing happened to me so I went back to the shop and they told be it was an infection so I had to remove it

They did tell me the infection was due to rejection